Well, I'd read about the mod on TQ.net and decided in one of my crazier moments to try it out from the beginning with an L1 character. It's really meant for farming purposes since mobs are maxed, lots of heroes spawning in groups of 5/6 at a time and most bosses spawn at 24 each. For the Gorgon Sisters that means you're facing 72 of them!
I decided to play a Diviner and last heard she was somewhere in Act 4 Normal, having died a few times along the way of course, but still going. It's slightly better in Act 4 as only 12 of each spawn. I was even writing a journal of her journey on the old forum.
Here's the numbers that spawn:
Act I: Nessus (24), Polyphemus (24), Aracne (24), Gorgon sisters (24x3), Hidra (9), Alastor (24), Talos (9), Minotaur Lord (24), Megalesios (18).
Act II: Scarab (24), Statues under the sphinx (4 of each; and good news here: the numer of statues and canopies are the same, so once you have killed all the statues you can enter the room to take the "hand of eternity"), Nehebkau (24), Manticore (9), Aktaios (18), Sand Spectre (24).
Act III: Quimera (24), Barmanu (24), Yeti (24), Xiao, the giant peng (24), Bandari (24), Liche Dragon (9), Yaoguai (24), Ormenos (12).
Olympus: Typhon (24).
Act IV: Grayas (12x3), Charon (12), Cerberus (12), Undead Typhon (12), and Hades (12).